S-91465A224 5/8"-11 x 4 1/2" ASTM A307 Square Head Screws
Square Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional durability with Grade A steel construction and Rockwell B69 hardness for reliable performance in demanding industrial environments
- Superior torque transmission through the external square drive design, preventing cam-out during high-torque applications
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensures secure fastening and easier installation
- Enhanced holding power from the partially threaded design that concentrates strength where needed most
- Proven reliability with 60,000 PSI tensile strength meeting ASTM A307 specifications for consistent performance
- Environmental compliance with RoHS 3 standards, ensuring safe use across regulated industries
- Versatile application capability with 4½" length and 1½" minimum thread length accommodating various material thicknesses
Professional Applications & Engineering Value
This 5/8"-11 UNC square head screw delivers critical engineering solutions for heavy-duty industrial applications where reliability is paramount. The Grade A steel construction combined with Rockwell B69 hardness provides exceptional resistance to deformation under load, while the coarse UNC threading ensures rapid installation and superior grip in wood, metal, and structural components. The external square drive design prevents stripping common in high-torque scenarios, and the partially threaded configuration concentrates strength at the engagement point, reducing stress concentration. These features make it ideal for construction, machinery assembly, and structural framing where vibration resistance and long-term fastening integrity are essential.
Specification Summary & Compliance
This square head fastener maintains Unified Standard Class 2A thread fit tolerances for consistent engagement and features 5/8"-11 UNC coarse threading with right-hand orientation. Manufactured to ASTM A307 specifications with 60,000 PSI tensile strength rating, it delivers reliable performance for low-strength applications. The product is fully RoHS 3 (2015/863/EU) compliant and meets all ASTM Grade A material requirements, ensuring regulatory adherence for industrial and construction use.
